/*
 * Copyright (c) 2008-2016 Haulmont.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.haulmont.cuba.core.app.scheduling;

import com.haulmont.cuba.core.entity.ScheduledTask;

import java.util.Date;
import java.util.List;

/**
 * Interface used by {@link Scheduling} to coordinate work in distributed environment. Class {@link Scheduling} itself
 * doesn't contain any logic to provide synchronization of singleton schedulers, delegating this task to the
 * <code>Coordinator</code>.
 *
 */
public interface Coordinator {

    String NAME = "cuba_SchedulingCoordinator";

    interface Context {
        List<ScheduledTask> getTasks();
    }

    Context begin();

    void end(Context context);

    boolean isLastExecutionFinished(ScheduledTask task, long now);

    long getLastFinished(ScheduledTask task);
}
